Stratos is the Lord of Avion, a civilization of winged simians called Avionians or Bird People. Avionians live high on the peaks of the Mystic Mountains in a city called Avion. Stratos is the leader of his people and is married to Lady Delora (According to the Mini-Comics and other Publications). In the cartoons, there is no mention of a wife. All Avionians have the ability to fly using the magical Egg Of Avion (Fimation Cartoons) or the Emerald Staff Of Avion (Publications). Many, Avionians, including Stratos, have augmented their armor with rocket packs and jets to increase their speed and distance. Like all Avionians, Stratos can fire energy projectiles out of his hands. As a member of the Masters of the Universe, Stratos fights bravely against the evil forces of Skeletor.

Origin #1 (Mini-Comics & Early Publications)

In the mini-comics, Stratos is married to an ordinary human girl, Delora, who also appears in numerous storybooks of the time. In "Wings of Doom", by Ladybird Books, she appears as a blonde Avian with blue clothes, but still Stratos' wife. The "Siege Of Avion" in a Mini-Comic adaption of Filmation's "Reign Of The Monster". Like other characters, such as Man-At-Arms and Mer-Man, Stratos' appearances in the minicomics decreased as the line went on despite being a central character to start with.

Origin #2 (Filmation)

Stratos' portrayal in He-Man and the Masters of the Universe, cartoon series by Filmation is generally consistent with his portrayal in Mattel's mini-comics. He is the leader of the Bird People, who inhabit the airborne land of Avion, located high in the Mystic Mountains. However, the cartoon makes a significant change to Delora's character by making her Stratos' sister rather than his wife, and therefore one of the Bird People as well. This change was made because the show's producers did not feel their target audience of young boys would react well to love interests within the show. Stratos appears regularly in the early episodes, often fighting alongside Ram-Man. His most significant episode is "Reign of the Monster", which focuses around his kingdom coming under attack by Skeletor. The episode features the only cartoon appearance of Delora. Despite being established as one of He-Man's leading battle comrades, Stratos receives little character development in comparison to other characters, and as a result gradually fades into the background of the series, to the point that his character is almost forgotten, his appearances sparse at best. However, in the middle of the show's second season another episode is written around him: "Betrayal of Stratos", in which he is exiled from Avion after being framed for a crime by a vengeful Birdwoman, Hawke. This episode reveals that his people gain their power of flight from the Egg of Avion, a large egg, which presumably powers the jetpacks on their backs. Although he rules over the Bird People, he is frequently called away from Avion to aid He-Man in his battles against Skeletor.

Origin #3 (200X MVProductions Comics & MYP Cartoons)

Stratos became Lord Of Avion, when he and his sister, Hawke, recovered the Egg Of Avion, fallowing the slaughter of their parents and many high ranking members of the race. Eventually, Stratos married Delora, who would rule Avion, while Stratos went to Eternos, to help King Randor fight in the Great Unrest. Stratos became one of the original Masters Of The Universe. His appearance is slightly modified. Whereas in the old continuity his wings seem to be merely attached to his body, the relaunch depicts him with large, widespread wings which are part of his anatomy, and his jetpack serves to enhance, rather than produce, his power of flight. In the new cartoon series, Stratos is seemingly one of the older members of the Masters, and is given a Scottish accent remarkably similar to that of actor Sean Connery. His Bird People once again feature in the new series. The most prominent bird person besides himself is a birdwoman named Hawke, who seems to be a combination of the 80s series' characters Hawke and Delora. Although she shares her name with the classic character Hawk, her personality is different. She is close and loyal to Stratos rather than power-hungry and vengeful like her '80s counterpart. Although their family relationship is never actually mentioned in the series, she is also Stratos' sister, like Delora in the '80s cartoon. This is stated in the series bible as well as the comic books that accompany the show. Stratos' most significant episodes of the new show are "Skywar", which features his people being manipulated by Skeletor into entering a war with Buzz-Off's race, and "Trust", in which he is forced into forming an uneasy alliance with Trap-Jaw to cross the Ice Mountains.

Origin #4 (Masters Of The Universe Classics Bios)

Stratos dies in the final battle of the "Second Ultimate Battleground". It is unspecified how. The title of "Lord Of Avion" is passed on to to a fellow Avionian named Tufos.

Trivia (Clawful94): In the German Audio Play "Mystic Tree Of Avion", it is mentioned that Stratos and Lady Delora have two children. Accoding to the "World I.P. Annuels" , Stratos has a cousin named Syracu. Mattel originally intended for Stratos to be one of Skeletor's henchmen. Also, in an unmade episode of Filmations Princess Of Power, Stratos was suposed to travel with He-Man to Etheria, where he goes one-on-one with Vultak. Lou Scheimer voiced Stratos in the Filmation Cartoons and Scott McNeil voiced him in the 200X MYP Cartoons.